1121554532 has 72 divisors (see below), whose sum is σ = 2426022144. Its totient is φ = 450793728.

The previous prime is 1121554531. The next prime is 1121554579. The reversal of 1121554532 is 2354551211.

It is a junction number, because it is equal to n+sod(n) for n = 1121554495 and 1121554504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121554531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1542353 + ... + 1543079.

It is an arithmetic number, because the mean of its divisors is an integer number (33694752).

Almost surely, 2^1121554532 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121554532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1213011072).

1121554532 is an abundant number, since it is smaller than the sum of its proper divisors (1304467612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121554532 is a wasteful number, since it uses less digits than its factorization.

1121554532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225 (or 1216 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 1121554532 is about 33489.6182719362. The cubic root of 1121554532 is about 1038.9790683814.

The spelling of 1121554532 in words is "one billion, one hundred twenty-one million, five hundred fifty-four thousand, five hundred thirty-two".